<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8"/>
    <meta content="width=device-width, initial-scale=1.0" name="viewport"/>
    <title>Document</title>
    <style>
        .box {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: red;
            position: absolute;
            left: 0;
            top: 0;
        }
    </style>
</head>
<body>
<div class="box" style="top: 0; left: 0"></div>
</body>

<script>

    

</script>
</html>
